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Gravity and geodetic control of geodynamic activity near Aswan Lake, Egypt
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SYSNO ASEP 0339151 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Gravity and geodetic control of geodynamic activity near Aswan Lake, Egypt Author(s) Mrlina, Jan (GFU-E) ORCID, RID
Radwan, A. H. (EG)
Issawy, E. S. A. (EG)
Rayan, A. (EG)
Mahmoud, S. M. (EG)Source Title EGRSE. Exploration Geophysics, Remote Sensing and Environment. - : Česká asociace geofyziků - ISSN 1803-1447
Roč. 16, č. 1-2 (2009), s. 1-8Number of pages 8 s. Publication form CD ROM - CD ROM Language eng - English Country CZ - Czech Republic Keywords gravity monitoring ; surface movements ; Lake Aswan ; groundwater change Subject RIV DC - Siesmology, Volcanology, Earth Structure R&D Projects IAA300120905 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z30120515 - GFU-E (2005-2011) Annotation Geodynamic investigations in the Aswan Lake region were started after the M=5.5 earthquake in 1981, triggered by the lake water fluctuations. Besides establishing the seismological networks, also the geodetic observations focused on the Kalabsha and Sayal fault zones were started. It was found the the Kalabsha fault is an active dextral strike-slip with normal component indicating uplift on its southern side. However, the annual velocity rates in both components do not exceed 2 mm/y, and do not therefore represent extremely active faulting. We also launched gravity monitoring in 1997, and performed another two campaigns in 2000 and 2002. The observed non-tidal temporal gravity changes indicate rather the flood water infiltration into the porous Nubian sandstone, than tectonic stress effect. The station nearest to the lake exhibited about 60 mGal positive gravity change within the 1997-2002 period. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2010
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